Preparation method of lithium manganese base-enriched ternary composite anode material

A composite positive electrode material, lithium-rich manganese-based ternary technology, applied in the preparation of lithium-rich manganese-based ternary composite materials, the field of preparation of lithium-rich manganese-based ternary composite positive electrode materials, can solve the problem of large particle size and wide particle size distribution , the first irreversible capacity of particle agglomeration and other issues, to achieve the effect of uniform particle size distribution, high energy density, and reduction of the first irreversible capacity

CN102655232AInactive Publication Date: 2012-09-05BEIJING INSTITUTE OF TECHNOLOGYGY

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Patent Information

Authority / Receiving Office: CN · China
Current Assignee / Owner: BEIJING INSTITUTE OF TECHNOLOGYGY
Publication Date: 2012-09-05
Estimated Expiration: Not applicable · inactive patent

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Abstract

The invention relates to a preparation method of lithium manganese base-enriched ternary composite anode material, belonging to the field of green energy resource material. The method comprises the following steps of: stirring to make the mixture dissolve so as to obtain mixed solution; putting precipitator in the water to dissolve in a stirring way, so that precipitator solution can be obtained; mixing the mixed solution with the precipitator solution to obtain reaction liquid, adjusting the pH value of the reaction liquid into 7.0-12.0, stirring for reaction, aging, filtering to obtain precipitate, and washing the precipitate by detergent; cooling the washed precipitate into the temperature which is less than or equal to -10 DEG C, and freezing for the time which is more than or equal to 1h, and drying under the vacuum degree which is less than or equal to 10.0Pa, so that a precursor can be obtained; and mixing the precursor with the lithium salt to carry out thermal treatment, so that the lithium manganese base-enriched ternary composite anode material can be obtained. The material prepared by the method is small in granularity, even in particle size distribution, and high in activity, so that the first irreversible capacity can be reduced, and the cycle performance of the lithium ion secondary battery taking the material as the anode material can be improved.

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Description

technical field

[0001] The invention relates to a preparation method of a lithium-rich manganese-based ternary composite positive electrode material, specifically, the invention relates to a preparation method of a lithium-rich manganese-based ternary composite material used as a lithium-ion secondary battery positive electrode material, belonging to The field of green energy materials. Background technique

[0002] As a new generation of rechargeable high-energy batteries, lithium-ion secondary batteries have many advantages such as high working voltage, high energy density, good safety performance, long cycle life and low self-discharge. After the successful commercialization of the secondary battery, it has been widely used in many portable electronic devices such as mobile phones, notebook computers and instruments. Application prospects.

[0003] The cathode material of a lithium-ion secondary battery is one of the main factors affecting its cost and performance. The...

Claims

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